sorry all, i've just waken up, it's 8AM here
first, thank you all for answering my problem
yes, maximum frequency i can have is 3KHz
with CrossRoads's help, the frequency increases a bit. Actually, this project is for testing an amplifier, i need to make sine wave that have frequency range from 10Hz to about 20KHz in order to create the frequency response of the amplifier
i'm still trying all the solutions you gave but it seems it doesn't work. Maybe i should look for another solutions instead of using DAC
Anyway, thank you all